Respirator mouthpiece



FIG. 1 is a front perspective view of a respirator mouthpiece showingour new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is an enlarged cross sectional view taken along the line 5--5 ofFIG. 3;

FIG. 6 is an enlarged cross sectional view taken along the line 6--6 ofFIG. 3;

FIG. 7 is a front elevational view of the respirator mouthpiece showinga second embodiment, the differences from the first embodiment, thedifferences from the first embodiment being in the generally ovallip-engaging portions and in the external shapes of the main bodyportion;

FIG. 8 is a right side elevational view of FIG. 7;

FIG. 9 is a top plan view of FIG. 7; and

FIG. 10 is a bottom plan view of FIG. 7.

The ornamental design for a respirator mouthpiece, as shown and described. 